Dry-kiln truck.



` No. 746,816. PATBNTEDDEG. 15,` 1903.

A DRY KILN TRUCK.

APPLIUATION EILED SEPT. 5, 1902.

N0 MODEL.

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UNITED STATES Patented ecmber 15,1903

PATENT OFFICE.

D RYJKILN TaupcK.

SPECIFICATION forming part of Letters Patent No. 746,816, dated December15, 1903. Application mea september 5. 190s. serial No. 122,258. etman.)

To all whom/it may 'con/cern:

Be it knownvthat'LCHARLEs ALcoT'r Gon- DARD, a citizen of the UnitedStates of America, and a resident of theei-ty of Seattle, in thecountyof King and State of Washington, have invented certain new anduseful Improve-y ments in Dry-Kiln Trucks, Cof `which the following is aspecifieati'om My invention relates to improvements inlumber-trncks,'and has special reference to a device of this kindespecially useful in lumber dry-kilns. v

Among numerous objects obtained by this invention and readilyunderstood; from the following specication and accompanyingdrawings,included as a part thereof, is the production of a simple andinexpensive lumbertruck especially adapted for use in dry-kilns andembodying essential features of Vdurability, general eiciency, andadjustability, which prolonge its usefulness, renders the truck of lightweight, easy to operate, and reduces to a minimum the liability ofbreakage.

The above-mentioned objects are attained by the construction,combination, and arrangement of parts as disclosed on the drawings setforth in the specification, and succinctly pointed out in the appendedclaims.

With reference to the drawings filed herewith and bearing iike referencecharacters for corresponding parts throughout, Figure 1 is a verticaltransverse section of the truck, taken on line 1 1 of Fig. 2 and viewedas the arrows indicate. Fig. 2 is a vertical longitudinal section of oneof the chairs or separations, taken on line 2 2 of Fig. 1 viewed as thearrows fly and indicated With aV portion of one member comprising thebolster in relative position. Fig. 3 is a perspective-v view, on reducedscale, of one of the chairs or separators removed. Fig. 4 is a View inside elevation of the entire truck on small scale, and Fig. 5

is a plan view of same on like scale.

This elevation includes a chair, as 10, a bearing-wheel l2 rotatablymounted thereon, and a bolster Vcomprising oppositelydisposed beams 14,supported on a plurality of said chairs. Thischair comprises anopenrectangular frame of considerable depth and of suitable length and widthto receive a respective wheel, as 12, and preferably composed of asingle piece of metal brought to the required shape by casting or thelike. Adjacent the lower side edges of the chair suitablelaterally-projecting ribs 15 are arranged as brackets, whichpreferablyextend the full length ofthe chair and serve as extended bearings forthe beams 14., and substantially midway the length of these sidessuitable transversely-disposed apertures 16 are formed adjacent theloweredge to receive the ends of theaxle, as 17, of the bearing-wheel, andbolt-receiving giiooves 9 are formed longitudinally to the end walls ofthe chair to effect amore rigid connection of the bolster. Theaperturesl are so disposed that the upper .portions thereof occur abovethe top edge of ribs l5, so that when the beams 14 are in place thelower 'edges thereof serve to prevent longitudinal displacement of theaxle, which is ,thereby conveniently held in place and the use ofset-screws, keys, or like fastenings for the purpose avoided and theheight of the truck reduced to a minimum Without sacrificing clearanceabove the traction-surface. As now considered each bearing-wheel ismounted on suitable rollers, as 18, placed about the axle 17, andconsisting of sections of round rods, which are preferably rendered ofless length than the inside width of the chair, Eig. 1, so that they arepermitted to move longitudinally on the axle to partially compensate forlateral irregularities in the track. Each bearing-Wheel is formedwithbppositelydisposed treadembracing flanges on the periphery andpreferably rendered with the'bore of less depthv thanthe length ofrollers 18, so that the wheel will have snflicient lateral play thereonto avoid binding against the side of the chair in case of cramping onthe track, and in the present embodiment an annular recess 20 is formedin the bore of the wallconcentric therewithand comprehends 'a reservoirto retain a supply of lubricant, as graphite or the like. This recess ispreferably rendered substantially T shape, as viewed in cross-section,Fig. l, and so disposed that the stern portions extend to the bore andforms a restricted annular openingb'etween the head of the recess andbore, which prevents the passage of an excess of lubricant to thebearings of the wheel, while allowing the reservoir proper to berendered of larger capacity, and furthermore leaves the major portion ofIOO the Wall of the bore unbroken for a more perfect bearing. Leading tothe recess 20 is a suitably-disposed aperture 21, through which thelubricant is conveniently introduced, and as now considered thisaperture is formed in the web ofthe wheel closely adjacent the bore andis preferably arranged in a substantially horizontal position to betterprevent escape of the lubricant.

In the present construction the beams 14 comprise channel-bars composedof steel and are equal in height to the width of the side of the chairmeasuring upwardly from the top of the brackets 15, so that the topsurface of the truck is left even throughout. These beams are placed onsaid ribs 15 with their smooth side surfaces against the sides of thechairs and suitable apertures arranged in the web of the beamsconcentric with the grooves 9, formed in the end walls of the chair, andserve to bind said beams and chair rmly together.

In the present instance the truck is arranged with a chair adjacent eachend of the bolster; but in extremely long trucks a centrally-disposedchair may be added if desired.

The device thus presented is simple of construction, has few partslikely to get out of order, and can be quickly assembled. It furthermoreembodies maximum strength with minimum weight, as it is not necessary tocut away large portions of the channel to afford journals for the axles,which instead are journaled in the side walls of the chairs in seats ofcomparatively extensive length, and these bars have substantially longsurfaces bearing upon the chairs, and can consequently be renderedcorrespondingly lighter Without sacriicing strength. By the particulararrangement for lubrication disclosed the bearings of the rollers arekept perfectly lubricated and the necessity for using oil for thepurpose and resultant dangers of re in the kiln avoided. Furthermore,the space afforded for lateral play of the bearing-wheels on therollers, as indicated, compensates for crookednessin the track, andthereby avoids cramping.

It will be understood that the lubricant normally lies in the lower partof the recess or reservoir, and as the wheel is operated portionsthereof cling to the wall of the bore and pass above the rollers, and apart then falls thereupon through the restricted opening, while thebalance strikes upon the opposite Wall of the head of the recess andreturns to normal position. It willthus be seen that the head portion ofthe reservoir can be made of sufficient size to contain a comparativelylarge supply of lubricant, While but a limited portion thereof will passto the bearings, and consequently the replenishing of the lubricantoccurs at less-frequent intervals and a saving of time is elected.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States of America, is-

1. In a truck, a chair comprising an Open rectangular frame, and abracket formed along the outer surface of each of the opposites sides ofthe frame, said chair having transverse bolt-recei ving grooves in theouter surface of its ends.

2. In a truck, a chair comprising an open rectangular frame having axleapertures formed in its opposite sides, and bolster-supporting bracketsalong the outer surfaces of the sides adapted to support bolsters acrossa portion of each aperture.

3. In a truck of the nature indicated; the combination with a chaircomprising an open rectangular frame of considerable depth, and having arib extending along the lower outer edge of each side and anaxle-aperture in each side with a portion thereof above said rib; of abols ter comprising oppositely-disposed beams seated on said ribs andmeans to secure the beams'to the chair.

4. In a truck of the nature indicated, the combination with an axleseated 4in separated supports; of rollers of less length than thedistance between said supports and a Wheel mounted thereon having a hubof less depth than the length of said rollers.

5. In a truck, the combination with a plurality of chairs eachcomprising an open rectangular frame provided with a rib along the lowerouter edge of each side and having axle-apertures in said sides, eachend wall of said chair having a bolt-receiving groove, and an axle insaid apertures, of a bolster comprising oppositely-disposed channel-barsseated on said ribs, and binding-bolts connecting said bars and lying insaid grooves.

6. In a truck of the nature indicated; the combination with a chaircomprising an open rectangular frame of considerable depth, and an axleseated in the sides of said frame; of rollers on said axle of lesslength than the `separation of the sides of said frame, and a wheelmounted on said rollers and having the hub of less depth than the lengthof the rollers.

7. In a truck, a plurality of chairs each comprising an open rectangularframe, ribs along the opposite sides ofthe chair, a bearing-wheelrotatably mounted in each chair, holsters comprising oppositely-disposedbars seated on the ribs, and means for securing the bars to the chairs.

8. In a truck, a plurality of chairs each comprising an open rectangularframe, a bracket formed on each of the opposite sides of the chairs,said sides having axle-apertures, each aperture having a portion abovethe bracket, axles supported in said apertures, bearing-wheels mountedon said axles, bolsters comprising oppositely-disposed bars seated onsaid brackets, and means for securing said bars to the chairs.

9. A truck of the nature indicated; coinprising a plurality of chairseach comprising an open rectangular frame of considerable depth andhaving a bracket extending along the lower outer edge of opposite sidesand axle-apertures in said sides witha portion ICO IIO

1e means to bind said beams to the chairs.

10. In a truck, the combination with a chair supported by abearing-Wheel, of a pair of oppositely-dispsed Channel-bars supported onthe chair, and means for binding the @hair between the bars to preventlateral displacement of the bearing-Wheel.

Signed at Seattle, Washington, this 4th day of August, 1902.

CHARLES ALCOTT GODDARD. Witnesses:

ALBERT JOHNSTON,

JAMES WEED.

